Yield Here To Pedestrians - Red and Black - Left Arrow - 18 x 24 - HIA Type III Prismatic High Intensity Reflective Sheeting by 3M on .080 Aluminum Road Signs (For any traffic control or street name sign, i.e. stop signs, speed limit signs, warning signs, etc.)- This prismatic lens material will reflect at night when light hits it. These road signs are three times more reflective than engineer grade. Constructed of .080 inch thick aluminum with high intensity sheeting. They will never rust and have an average life span of over 10 years. These signs meet most State DOT and Federal MUTCD specifications.